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Mon, 10 Aug 2020 09:01:00 -0700 (PDT) Subject: Re: BUG: unable to handle kernel NULL pointer dereference in loop_rw_iter To: syzbot , io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk References: <00000000000066583105ac87dbf4@google.com> From: Jens Axboe Message-ID: Date: Mon, 10 Aug 2020 10:00:59 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <00000000000066583105ac87dbf4@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org On 8/10/20 9:46 AM, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 9420f1ce Merge tag 'pinctrl-v5.9-1' of git://git.kernel.or.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=13662f62900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=72cf85e4237850c8 > dashboard link: https://syzkaller.appspot.com/bug?extid=1abbd16e49910f6bbe45 > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15929006900000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15e196aa900000 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+1abbd16e49910f6bbe45@syzkaller.appspotmail.com Already fixed, just not upstream yet: https://git.kernel.dk/cgit/linux-block/commit/?h=io_uring-5.9&id=2dd2111d0d383df104b144e0d1f6b5a00cb7cd88 -- Jens Axboe